rule of thumb

noun phrase

1
: a method of procedure based on experience and common sense
2
: a general principle regarded as roughly correct but not intended to be scientifically accurate

Examples of rule of thumb in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
So, the decision to veer from the 4% rule of thumb should not be taken lightly. Wes Moss, Forbes, 20 Mar. 2025 To appreciate Tatlin on his own terms, here is a good rule of thumb: lopsidedness is next to godliness. Jackson Arn, The New Yorker, 10 Mar. 2025 The biggest rule of thumb or nonofficial recession indicator is the technical notion of back-to-back quarterly contractions in real gross domestic product — the broadest measure of economic activity. Alicia Wallace, CNN, 10 Mar. 2025 There are lots of ways to do this, but a good rule of thumb is to pick patterns that are either completely opposite or very similar. Bestreviews, Chicago Tribune, 6 Mar. 2025 See All Example Sentences for rule of thumb

Word History

First Known Use

circa 1658, in the meaning defined at sense 1

Time Traveler
The first known use of rule of thumb was circa 1658

Browse Nearby Words

Cite this Entry

“Rule of thumb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rule%20of%20thumb. Accessed 24 Mar. 2025.

Kids Definition

rule of thumb

1
: a method based on experience and common sense
2
: a general principle that is roughly correct
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!